Alkyl zinc chlorides as new initiators for the polymerization and copolymerization of isobutene

Guerrero, Antonio, Kulbaba, Kevin and Bochmann, Manfred (2008) Alkyl zinc chlorides as new initiators for the polymerization and copolymerization of isobutene. Macromolecular Chemistry and Physics, 209 (16). pp. 1714-1720. ISSN 1022-1352

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Abstract

Mixtures of RZnCl and tBuCl (R = Et) initiate the polymerization of isobutene in the temperature range of (- 35) - (+ 35) degrees C. The order of addition of the reagents is important for effective polymerization. Increasing the solubility of the zinc reagent (R = n-octyl) and use of cumyl chloride as co-initiator provides a system that is active from (-90) - (+35) degrees C. The molecular weights show a remarkably small temperature dependence, E-DP = -3.3 KJ.mol(-1), compared to E-DP = -23 kJ.mol(-1) in classical systems (AlCl3, EtAICl(2)). The molecular weights increase with decrease in zinc concentration and are consistently higher for n-octyl zinc chloride, as expected for a bulkier, less coordinating counteranion polymerizations are not retarded by isoprene addition; homopolymers and copolymers show essentially identical conversions and molecular weights.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Chemistry (former - to 2024)
UEA Research Groups:	Faculty of Science > Research Groups > Chemistry of Materials and Catalysis Faculty of Science > Research Groups > Chemistry of Light and Energy Faculty of Science > Research Groups > Synthetic Chemistry (former - to 2017)
Depositing User:	Vishal Gautam
Date Deposited:	02 Nov 2010 17:48
Last Modified:	06 Feb 2025 02:26
URI:	https://ueaeprints.uea.ac.uk/id/eprint/10542
DOI:	10.1002/macp.200800150

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